[El-errata] New Ksplice updates for UEKR7 5.15.0 on OL8 and OL9 (ELSA-2023-12858)

[Errata Announcements for Oracle Linux]

Synopsis: ELSA-2023-12858 can now be patched using Ksplice CVEs:
CVE-2023-1989 CVE-2023-20588 CVE-2023-3772 CVE-2023-3773 CVE-2023-39194
CVE-2023-40283 CVE-2023-4128 CVE-2023-4194 CVE-2023-4273 CVE-2023-4569
CVE-2023-4622 CVE-2023-4911

Users with Oracle Linux Premier Support can now use Ksplice to patch
against the latest Oracle Linux Security Advisory, ELSA-2023-12858.
More information about this errata can be found at
https://linux.oracle.com/errata/ELSA-2023-12858.html

INSTALLING THE UPDATES

We recommend that all users of Ksplice Uptrack running UEKR7 5.15.0 on
OL8 and OL9 install these updates.

On systems that have "autoinstall = yes" in /etc/uptrack/uptrack.conf,
these updates will be installed automatically and you do not need to
take any action.

Alternatively, you can install these updates by running:

# /usr/sbin/uptrack-upgrade -y


DESCRIPTION

* CVE-2023-4911: Buffer overflow in the GNU C Library's dynamic loader while processing environment variables.

Incorrect processing of environment variables in the GNU C Library's
dynamic loader ld.so can result in buffer overflow. This flaw could
allow a local attacker to elevate their privileges when launching
binaries with SUID permission.


* CVE-2023-4128: Use-after-free when modifying Netfilter U32/route filters.

A logic error when copying an internal memory structure can lead to a
use-after-free when modifying certain Netfilter filters.  A local
attacker could exploit this flaw to escalate their privileges.


* CVE-2023-4194: Permission bypass when using TUN/TAP device driver.

Usage of an incorrect permission attribute when opening a TAP or TUN
device could lead to a permission bypass. A local attacker could use
this flaw to bypass network filters and gain unauthorized access.
Note: this updates improves the fix for CVE-2023-1076 which was
incorrect.


* CVE-2023-40283: Use-after-free during Bluetooth socket teardown.

An incomplete cleanup operation when tearing down Bluetooth L2CAP
sockets can lead to a use-after-free.  This flaw could potentially be
exploited to cause a denial-of-service or other unexpected behavior.


* CVE-2023-39194: Information disclosure when using xfrm subsystem.

A missing check when using xfrm subsystem could lead to an out-of-bounds
access. A local user could use this flaw to leak sensitive information.


* CVE-2023-3772: Denial-of-service in the IP framework for transforming packets.

A missing check in the IP framework for transforming packets could lead
to a NULL pointer dereference. A local attacker could use this flaw to
cause a denial-of-service.


* CVE-2023-4569: Denial-of-service in netfilter nf_tables.

Incorrectly disabled catch-all set elements may result in a memory leak.
An attacker could use this flaw to exhaust the system's memory and
eventually cause a denial-of-service.


* CVE-2023-4273: Out-of-bounds memory access in exFAT.

Improper bounds checking in the exFAT driver when extracting the uni name
of a file from the directory index could lead to a stack overflow. A
local privileged attacker could use this flaw to execute arbitrary code
on the system.


* CVE-2023-20588: Information disclosure on AMD CPUs.

A hardware flaw on some AMD processors when handling division-by-zero
errors may result in speculative data exposure. An attacker could use this
flaw to access sensitive information.

Orabug: 35776935


* CVE-2023-3773: Information leak in the networking transformation sub-system.

A missing type description in the networking transformation code could lead
to reading four uninitialized bytes.  A local attacker could use this flaw
to leak memory from the kernel heap.


* CVE-2023-4622: Use-after-free when sending data through Unix sockets.

A locking error when sending data through a Unix sockets that is
concurrently being pruned from garbage collected file descriptors could
lead to a use-after-free.  A local, unprivileged user could use this flaw
to cause a denial-of-service or escalate its privileges.


* CVE-2023-1989: Denial-of-service when unloading the Bluetooth SDIO driver.

A missing clean-up routine to cancel a timer when removing a Bluetooth SDIO
could lead to a use-after-free.  A local, privileged user could use this
flaw to cause a denial-of-service.

SUPPORT

Ksplice support is available at ksplice-support_ww at oracle.com.